CVE-2026-41228 | THREATINT

Description

Froxlor is open source server administration software. Prior to version 2.3.6, the Froxlor API endpoint `Customers.update` (and `Admins.update`) does not validate the `def_language` parameter against the list of available language files. An authenticated customer can set `def_language` to a path traversal payload (e.g., `../../../../../var/customers/webs/customer1/evil`), which is stored in the database. On subsequent requests, `Language::loadLanguage()` constructs a file path using this value and executes it via `require`, achieving arbitrary PHP code execution as the web server user. Version 2.3.6 fixes the issue.

PUBLISHED Reserved 2026-04-18 | Published 2026-04-23 | Updated 2026-04-23 | Assigner GitHub_M

CRITICAL: 10.0CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Problem types

CWE-98: Improper Control of Filename for Include/Require Statement in PHP Program ('PHP Remote File Inclusion')

Product status

< 2.3.6

affected

References

github.com/...roxlor/security/advisories/GHSA-w59f-67xm-rxx7 exploit

github.com/...roxlor/security/advisories/GHSA-w59f-67xm-rxx7

github.com/...ommit/bc5e6dbaa90e6f3573129da640595e8c770e1d0c

github.com/froxlor/froxlor/releases/tag/2.3.6

cve.org (CVE-2026-41228)

nvd.nist.gov (CVE-2026-41228)

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